Lamp.



WNTE

srATns Para r cierren.

WILLIAM E. BURcKY,'oF CHICAGO, ILLINOIS.

LAMP.

My invention relates to an improvement in the class of lamps-usedv as signals on vehicles; and it relates, more particularly,.to an improvement inthe glass face of such a lamp through which the light-rays are p roing been primarily induced thereto jected.

Iv have more immediately devised my improvement for use in automobile lam v s, havecause of city-ordinances requiring modification of the light they throw, which is so intense as to be blinding with the 'resultant tendency to cause accidents.

In the accompanying drawing, Figure -1 issa broken view of a lamp-body provided with my improved face shown in vertical section, and Fig. 2 shows the face in elevation.

The lamp-face 3 is made of glass, preferably by molding it inthe disk-form illustrated, or of other suitable contour to fit its holder t on a lamp 5, the holder shown being a hinged annular head on the lamp, which, in the present case, may be an automobile lampV vof ordinary or any suitable construction.

Theface is provided withone vflat side, which may be the inner one, as shown; and the opposite, or outer side is formed with a series of transversely-extending' ridges having downwardly-inclined upper surfacesA 6 and horizontal, or approximately horizontal, lower surfaces 7. The glass forming the face 3 is transparent, as a whole, but the surfaces 6 are rendered translucent in any suitable way. This may be done` by darkening or coating them with a translucent pa1nt,` shellac or varnish, or by grindlng or frosting them, or otherwise.

With a light (not shown) burning in the lamp 5, therays passing through the translucent surfaces 6 are greatly modified in indegreev of illumination; and these surfaces reflect a portion of the light through the Specification of Letters retient.

Application led August 14, 1913.

llamp face. l tensity, and present a comparatively mild transparent surfaces 7 and direct them Patented Mar. 24, Ici a. serial No. 784,744.

downwardly..y toward the ground to illuminate the latter.. without producing the volo- Jectionable blinding effect of the light referred to.

My 'improvedglass lamp face may be used 1n a lamp 5v, when desired, with its ridged surface innermostand its opposite surface outermost, thus in a'position the reverse of that illustrated in Fig. 2. While my Improvement is shown as the glass covering-face of a lamp-body, it is within my invention to provide it in any form for .covering or shielding the light-4 rays passing through the face of a lamp-l body. y p

What I claim as new and desire to secure by Letters Patent is- 1. Aglass lamp-face covered on one side with a series of ridges of angular crosssection formed with` downwardly-inclined translucent outer lsurfaces and lower transparent surfaces eritending at' an angle to said inclined surfaces, for the purpose set forth..

2. A lamp-face comprising a body of transparent glass covered on one sidewith a series of ridges of angular cross-section formed with downwardly-inclined translucent outer surfaces and lower transparent horizontally-extending surfaces, for the purpose set forth.

3.; A lamp-face comprising a body of transparent glass provided on one side with a series of ridges of angular cross-section formed with downwardly-inclined outer sur faces' coated with translucent material and lower transparent surfaces extending at an angle to said inclined surfaces, said translucent-slnfaces adapted to act on' and diffuse the rays striking normal to the other side of l:said lamp'face. f

4. A glass lamp having on one side a plurality of ridges, a portion of each ridge beingtransparent and theremaining por tion being translucent, the translucent portions covering the entire surface acted upon by rays normal .tothe other side of said i E. BURCKY. 

